What happens to child stars?

From the days of "Our Gang" and Shirley Temple to Drew Barrymore and the Olsen twins, people have been obsessed with child stars and the way they grew up and adjusted. Or didn't. The guilty pleasure half-hour series "Child Star Confidential" (4 p.m. today, E!) enters a second season asking, "Where are they now?"

Today's installment follows up on former teenage boy sensations, including Ricky Martin, Jonathan Taylor Thomas and Malcolm-Jamal Warner. Kirk Cameron sits down for an interview to discuss his move from the Hollywood mainstream. The "Growing Pains" heartthrob has most recently appeared in direct-to-video adaptations of the "Left Behind" bestselling books.

¢ "Countdown to Ground Zero" (7 p.m. Sunday, History) looks at the fateful day on a moment-by-moment basis and how it unfolded for a cast of characters, including terrorists, firemen, FBI agents, airport flight-control workers and people going about their workday routine on Sept. 11, 2001.

Today's highlights

¢ Scheduled on a two-hour "Dateline" (7 p.m., NBC): an update on the murder of an affluent woman in a posh locale.